Zafit AI
Zafit is an AI health app for iOS. Workouts, meals, sleep, recovery and blood work in one place — with a coach that has seen all of it, not a fifth of it.
Free to start. iOS first. Your health data is stored on our own servers and is never sold.
Built to replace
Time it while it happens instead of guessing minutes afterwards. Calories come from the movement's own energy cost and your body weight — so a set of squats and a set of curls are not priced the same.
| Set | Previous | kg | Reps | |
|---|---|---|---|---|
| 1 | 80 × 5 | 85 | 5 | ✓ |
| 2 | 80 × 5 | 85 | 5 | ✓ |
| 3 | 80 × 5 | 85 | 5 | ✓ |
| 4 | 80 × 4 | 85 | — |
Every number is shown against the last time you did it. A figure with nothing to beat is trivia — the point of a record is the one before it.
It knows your goal, your injuries, what you slept and what failed last week. A short night lowers tomorrow's volume; a hard week raises the calorie target. That is the thing one app can do and six cannot.
Four steps, in the order that matters.
Goal, body stats, injuries, equipment. Connect Apple Health and what your phone already records comes with you.
Photograph a plate. Press start on a set. Score a match. Steps, sleep and heart rate arrive on their own.
Sleep changes training. Training changes intake. Labs change both. Nothing sits in a silo.
Rebuilt weekly against what actually happened — not against what the plan assumed would happen.
Health data lives on your device and on your own Zafit account. It is never sold and never used to train anybody's model. There is a page on this site whose only job is to delete all of it.
How the numbers are calculated, and what the research says.
No. It is stored on your device and on your own Zafit account, never sold, never used to train models. Deleting your account deletes it.
To start, yes. Logging, plans, the exercise library and Apple Health sync cost nothing. The AI coach, unlimited scans and lab analysis are paid — and the paywall appears where those features are, not as a banner in your settings.
Yes. Steps, distance, active calories, heart rate, HRV, sleep and weight sync automatically, and Zafit writes workouts back. You are asked once, during signup, with the reasons given first.
Yes. Every clock is anchored to an absolute instant rather than counting ticks, so a locked screen costs nothing. Runs record in the background, rest ends with a notification, and a live workout appears on the Lock Screen and Dynamic Island.
After iOS is right. Building both at once is how you get two mediocre apps.